J/MNRAS/501/4935 TYC 3700-1384-1, V1511 Her, V1179 Her minima (Broens, 2021)
Photometric analysis of three totally eclipsing W UMa stars with increasing
periods: TYC 3700-1384-1, V1511 Her and V1179 Her.
Broens E.
<Mon. Not. R. Astron. Soc. 501, 4935-4947 (2021)>
=2021MNRAS.501.4935B 2021MNRAS.501.4935B (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Ephemerides
Keywords: binaries: eclipsing -
stars: individual: TYC 3700-1384-1, V1511 Her, V1179 Her
Abstract:
The first multi-colour light curve models and period studies for the
totally eclipsing W UMa stars TYC 3700-1384-1, V1511 Her and V1179 Her
are presented. All three stars are A-subtype W UMa stars of spectral
type F. The light curve solutions show that TYC 3700-1384-1 has a
moderately low mass ratio of q=0.182±0.001 and a degree of
overcontact of f=49%. For V1179 Her a mass ratio q=0.153±0.001 and a
degree of overcontact of f=48% is derived. The solution for V1511 Her
is inconclusive, however the mass ratio is expected to be between
0.13<q<0.15. The evolutionary status is compared with zero-age main
sequence stars taking into account energy transfer from the primary to
the secondary component. The primary component of TYC 3700-1384-1 fits
well in the main-sequence, while V1179 Her is more evolved. The period
study reveals for all three stars a continuously increasing period at
a rate of dP/dt=6.1x10-7d/yr, dP/dt=5.0x10-7d/yr and
dP/dt=9.6x10-7d/yr for TYC 3700-1384-1, V1511 Her and V1179 Her
respectively. The estimated mass transfer rates derived from these
period changes are 1.6x10-7M☉/yr for TYC 3700-1384-1 and
1.9x10-7M☉/yr for V1179 Her.
Description:
Times of minimum light are calculated for the observations presented
in this paper, and for publicly available observations from Super Wide
Angle Search for Planets (Butters et al., 2010A&A...520L..10B 2010A&A...520L..10B),
Northern Sky Variability Survey (Wozniak et al., 2004AJ....127.2436W 2004AJ....127.2436W),
All-Sky Automated Survey All Star Catalogue (Pojmanski,
2002AcA....52..397P 2002AcA....52..397P, Cat. II/264) and All Sky Automated Survey for
SuperNovae (Shappee et al., 2014AAS...22323603S 2014AAS...22323603S), if available for the
studied star. For V1179 Her also times of minima from Diethelm
(2007IBVS.5781....1D 2007IBVS.5781....1D, 2008IBVS.5837....1D 2008IBVS.5837....1D, 2010IBVS.5920....1D 2010IBVS.5920....1D) and
Huebscher (2016IBVS.6157....1H 2016IBVS.6157....1H) are included.
Objects:
------------------------------------------------------------------------
RA (2000) DE Designation(s) (tables)
------------------------------------------------------------------------
17 55 27.47 +44 06 54.8 V* V1511 Her = TYC 3101-1180-1 (table7.dat)
02 45 45.27 +52 59 20.0 TYC 3700-1384-1 = NSVS 1926064 (table6.dat)
16 27 44.92 +11 03 38.1 V* V1179 Her = TYC 963-246-1 (table8.dat)
------------------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table6.dat 32 55 Times of minima of TYC 3700-1384-1
table7.dat 32 179 Times of minima of V1511 Her
table8.dat 32 39 Times of minima of V1179 Her
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Byte-by-byte Description of file: table6.dat table7.dat table8.dat
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Bytes Format Units Label Explanations
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1- 8 F8.1 d Epoch Cycle number
11- 22 F12.4 d HJD Heliocentric Julian Date
25- 30 F6.4 d e_HJD Uncertainty on Heliocentric Julian Date
32 I1 --- Data Data origin (1)
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Note (1): Data origin as follows:
1 = NSVS (Wozniak et al., 2004AJ....127.2436W 2004AJ....127.2436W)
2 = ASAS-3 (Pojmanski, 2002AcA....52..397P 2002AcA....52..397P, Cat. II/264)
3 = ASAS-SN (Shappee et al., 2014AAS...22323603S 2014AAS...22323603S)
4 = SWASP (Butters et al., 2010A&A...520L..10B 2010A&A...520L..10B)
5 = this paper
6 = IBVS 5781 (Diethelm, 2007IBVS.5781....1D 2007IBVS.5781....1D)
7 = IBVS 5837 (Diethelm, 2008IBVS.5837....1D 2008IBVS.5837....1D)
8 = IBVS 5920 (Diethelm, 2010IBVS.5920....1D 2010IBVS.5920....1D)
9 = IBVS 2016 (Huebscher, 2016IBVS.6157....1H 2016IBVS.6157....1H)
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Acknowledgements:
Eric Broens, eric.broens(at)skynet.be
(End) E. Broens [Vereniging Voor Sterrenkunde], P. Vannier [CDS] 18-Dec-2020